i cant understand what should i do?

Question about the task

Task No. 3 about integer type conversions

Resolved

package com.codegym.task.task10.task1003;

/*
Task No. 3 about integer type conversions

*/

public class Solution {
    public static void main(String[] args) {
        int f = (int) 128.50;
        int i = (int) f;
        int b = (int) (i + f);
        System.out.println((float)b);
    }
}

Add one type conversion to get the following answer: b = 0


float f = (float)128.50;
int i = (int)f;
int b = (int)(i + f);

Requirements:

The program should display text on the screen.
Don't change the screen output command.
The main() method must contain a float variable f.
The main() method must contain an int variable i.
The main() method must contain an int variable b.
Don't change the initial value of the variables during initialization. You can only add cast operators.
The program should display the number 0.

package com.codegym.task.task10.task1003; /* Task No. 3 about integer type conversions */ public class Solution { public static void main(String[] args) { float f = (float) 128.50; int i = (int) f; int b = (int) (i + f); System.out.println((float) b); } }

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ThomasLC

Level 16 , Singapore, Singapore

23 May 2019, 05:54

solution

Int b = (byte) (i + f) Byte range from -128 to + 128 so it has 256 possibilities. When you convert the byte of the answer (128.50 + 128) you get 256 which is 0 Dont worry if you are confused, I was too. This is computer science knowledge, for now just focus on typecasting different data types will change the value accordingly and experiment around.

+27

shovan

Level 22 , Kolkata, india

23 May 2019, 06:05

I got it, A lot of things have to remember in type casting, It is difficult but thank you ThomasLC ...sir...

Johannes

Level 27 , Centurion, Pretoria, South-Africa

17 March 2020, 13:52

it's not only stupid to code like this: it's stupid to give me an end answer, and ask me to manipulate the math to incorrectly convert to get there. How the heck must I know what will happen internally with each combination when deliberately casting it incorrectly ? It's little tasks like these that irritate the *** out of me. I want to learn Java, not 10 million ways to code unrealistic programs. I'm a coder in the real world, on a financial system, and we use the correct variables for the correct data, not like this. Ok, finished venting. Luckily there are smart guys like Thomas and Guade who always assist when it comes to these illogical programs.